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Film Structure-Induced Resonant Oscillation Changes in a Poly Acrylic Acid Modified Quartz Crystal Sensor
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2008 (English)In: Molecular Crystals and Liquid Crystals, ISSN 1542-1406, Vol. 492, p. 221-228Article in journal (Refereed) Published
Abstract [en]

A poly acrylic acid (PAA) film has been fabricated on a quartz crystal microbalance to study the dynamic property changes induced by different pH values. The experiment has been performed by a two-step. First, using the self-assembly procedure, the gold surface of quartz crystal was chemically modified to allow the graft copolymerization with PAA. Secondly, the resonant frequency response of the PAA-modified QCM was investigated by varying the pH values. The result shows an interesting oscillation property change nearby pH 5.5, and a possible mechanism for the change is proposed considering the oscillation properties of quartz crystal and the physical properties of PAA. Finally, a polymer film complex of PAA/collagen was also used to confirm the proposed mechanism.

Place, publisher, year, edition, pages
2008. Vol. 492, p. 221-228
Keywords [en]
collagen, pH effect, poly(acrylic acid), QCA, QCM
National Category
Chemical Sciences
Identifiers
URN: urn:nbn:se:uu:diva-107832DOI: 10.1080/15421400802330713ISI: 000260124800025OAI: oai:DiVA.org:uu-107832DiVA, id: diva2:233290
Available from: 2009-08-31 Created: 2009-08-31 Last updated: 2009-08-31Bibliographically approved

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